1. body {

  2.   /* GitHub.com frontend fonts */

  3.   font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial,

  4.     sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol;

  5.   font-size: 14px;

  6.   line-height: 1.5;

  7. }

  8. 

  9. h1 {

  10.   font-size: 1.5rem;

  11.   font-weight: bold;

  12.   margin-bottom: 0.5rem;

  13. }
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